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Methods and systems to facilitate reducing NOx emissions in combustion systems

a technology of combustion system and nox, which is applied in the field of combustion system, can solve the problems of affecting combustion performance of combustor, affecting the rapid and uniform mixing of lean-direct injection combustors, and affecting the efficiency of combustor components,

Active Publication Date: 2011-02-15
GE INFRASTRUCTURE TECH INT LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The quality of fuel and air mixing in the combustor affects combustion performance.
However, at least some known lean-direct injection combustors may experience difficulties in rapid and uniform mixing of lean-fuel and rich-air within the combustor liner.
As a result, combustor components may be damaged and / or the operability of the combustor may be compromised.

Method used

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  • Methods and systems to facilitate reducing NOx emissions in combustion systems
  • Methods and systems to facilitate reducing NOx emissions in combustion systems
  • Methods and systems to facilitate reducing NOx emissions in combustion systems

Examples

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Embodiment Construction

[0016]The exemplary methods and systems described herein overcome the structural disadvantages of known Dry-Low NOx (“DLN”) combustors by combining lean-premixed combustion and axially-staged lean-direct injection concepts. It should be appreciated that the term “LDI” is used herein to refer to lean-direct injectors that utilize lean-direct injection concepts. It should also be appreciated that the term “first end” is used throughout this application to refer to directions and orientations located upstream in an overall axial flow direction of combustion gases with respect to a center longitudinal axis of a combustion liner. It should be appreciated that the terms “axial” and “axially” are used throughout this application to refer to directions and orientations extending substantially parallel to a center longitudinal axis of a combustion liner. It should also be appreciated that the terms “radial” and “radially” are used throughout this application to refer to directions and orient...

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Abstract

A method for assembling a gas turbine combustor system is provided. The method includes providing a combustion liner including a center axis, an outer wall, a first end, and a second end. The outer wall is orientated substantially parallel to the center axis. The method also includes coupling a transition piece to the liner second end. The transition piece includes an outer wall. The method further includes coupling a plurality of lean-direct injectors along at least one of the liner outer wall and the transition piece outer wall such that the injectors are spaced axially apart along the wall.

Description

STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH & DEVELOPMENT[0001]This invention was made with Government support under DE-FC26-05NT42643 awarded by the Department of Energy (“DOE”). The Government has certain rights in this inventionBACKGROUND OF THE INVENTION[0002]This invention relates generally to combustion systems and more particularly, to methods and systems to facilitate reducing NOx emissions in combustion systems.[0003]During the combustion of natural gas and liquid fuels, pollutants such as, but not limited to, carbon monoxide (“CO”), unburned hydrocarbons (“UHC”), and nitrogen oxides (“NOx”) emissions may be formed and emitted into an ambient atmosphere. CO and UHC are generally formed during combustion conditions with lower temperatures and / or conditions with an insufficient time to complete a reaction. In contrast, NOx is generally formed under higher temperatures. At least some known pollutant emission sources include devices such as, but not limited to, industrial ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F02C3/06F02C3/14
CPCF23R3/286F23R3/346Y10T29/49323
Inventor LACY, BENJAMIN PAULKRAEMER, GILBERT OTTOVARATHARAJAN, BALACHANDARYILMAZ, ERTANLIPINSKI, JOHN JOSEPHZIMINSKY, WILLY STEVE
Owner GE INFRASTRUCTURE TECH INT LLC
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